Governor for dynamos.



PATENTED SEPT. 5, 1905.

C. A. Box. GOVERNOR PoR DYNAMos.

AYPLICTIOH FILED AUG. 12, 1903.

CHARLES A. ECK, OF NEWARK, NEV JERSEY.

GOVERNOR FOR DYNAMOS.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed August 12, 1903. Serial No. 169,172.

To (all whom it muy concern:

Be it known that I, CHARLES A. Een, a citizen of the United States ofAmerica, and a resident of Newark, county of Essex, and State of NewJersey, have invented certain new and useful Improvements in Governorsfor Dynamos, of which the following is a specification.

My invention relates generally to dynamos, and has more particularreference to a governor adapted to respond to fluctuations in voltage ofthe said dynamo.

My invention contemplates a governor whose action depends upon theiiuctuations of voltage of the dynamo, so that when the voltageincreases above a certain point the governor will act to lessen thespeed of the said dynamo and when the voltage decreases below a certainpoint the governor will act to increase the speed again. The voltage andthe speed of the dynamo thus reciprocate and tend to render both thevoltage and speed constant.

'ln carrying out this invention I construct my dynamo with a magneticfield and -with a rotatable armature-shaft carrying an armature and acommutator mounted Within the said field so as to move longitudinally.The

dynamo will be suitably driven by any means found useful for thepurpose, but will conveniently receive its motion from the iiywheel ofan internal combustion motor through the instrumentality of afriction-pulley moving with the armature-shaft. Means are provided forpositively moving the said armature-shaft out of its centrallongitudinal position and the friction-pulley into contact with thefiy-wheelaforesaid. When the voltage increases above a certain point,the magnetic field will act upon the armature-shaft so as to move thesame into its central longi- 'tudinal position and so as to withdraw thefriction-pulley from the wheel above mentioned. It will be understoodthat this movement is a very slight one and that by making the voltageof the dynamo variable it becomes for all practical purposesconstant;that is to say, the variation in voltage is so slight as tohardly be noticeable.

rlhe invention may of course be varied widely in its embodiment so longas the abovestated principles are maintained; but for the purpose ofdescription I have in the accompanying drawings shown my invention inseveral suitable forms, to which, however, 1 do not wish to beunderstood as limiting myself,

although the said particular structures embody in themselves valuablefeatures of construction.

ln the said drawings, Eigurcl represents a vertical sectional viewthrough a dynamo mounted adjacent to the fiy-wheel or other wheel of aninternal-combustion motor. Fig. 2 is a diagrammatic view showing thecircuit of the dynamo.

l indicates a dynamo mounted in this instance at an angle totheiiy-wheel or other wheel 2 of an internal-combustion motor, the sparkingdevice of which the said dynamo is adapted to supply with theelectricity. The said dynamo is provided with a magnetic fieldcomprising the casing 3, having the fieldcoils l and the pole-pieces 5.Mounted within the said field is the rotatable armature-shaft 6,carrying the armature 7 and the commutator 8. This armature-shaft is somounted as to be capable of a longitudinal movement within the saidfield. Connected with the said armature-shaft is a friction-pulley 9, inthis instance beveled and being attached to the said shaft by means of anut l1. Vithin the armature-shaft is a spring 12, which tends normallyto move the said shaft out of its central longitudinal position and tomove the said friction -pulley against the fly wheel. The tension ofthis spring may be adjusted by means of the threaded spindle l0.

The spring 12 in normally tending to keep the friction-pulley up againstthe iiy-wheel will normally increase the speed of the dynamo, the fieldbeing self-exciting, thereby raising the voltage of the same up to acertain point, when the said field becomes strong enough to overcome thetension of the spring and to move the said armature-shaft into its-central longitudinal position and the frictionpulley away from thefly-wheel. This has the effect of lessening the speed of the dynamo,thereby decreasing its voltage, so that the spring again will move thesaid frictionpulley toward the wheel and the armatureshaft out of itscentral longitudinal position, thereby increasing the voltage again.

In Eig. 2 is shown a diagram of the electrical circuit of the dynamo.The dynamo is shunt-wound, the field-coils i being connected to thebrushes 20, to which latter also lead the line-wires 2l. v

Having thus described my invention, what I claim is- 1. The combinationwith a driving-wheel, and a dynamo, one of which is mounted at an IOOIOS

angle to the other, of a magnetic field in said dynamo, a beveledfriction-pulley adapted to engage with said driving-wheel, a rotatablearmatureeshaft, carrying said pulley and carrying an armature and acommutator, mounted to move longitudinally within said field, andadapted to be moved into its central longitudinal position by the actionof the said field when the voltage increases above a certain point,thereby decreasing the speed of the armatureshaft, and means forautomatically moving the said shaft out of' its central longitudinalposition when the voltage drops below a certain point thereby increasingthe speed of the armature-shaft.

2. The combination with a driving-wheel, and a dynamo mounted atan angleto the driving-wheel, of' a magnetic field in said dynamo, a beveledfriction-pulley adapted to engage with said driving-wheel, a rotatablearmature-shaft, carrying said pulley and carrying an armature and acommutator, mounted to move longitudinally within said field, andadapted to be moved into its central longitudinal position by the actionof' the said field when the voltage increases above a certain point,thereby decreasing the speed of' the armature-shaft, and means forautomatically moving' the said shaft out ofl its central longitudinalposition when the voltage drops below a certain point thereby increasingthe speed of' the armature-shaft.

3. The combination with a driving-wheel, and a dynamo, one of which ismounted at an angle to the other, of' a self-exciting magnetic field insaid dynamo, a beveled friction-pulley adapted to engage with saiddriving-wheel, a rotatable armature-shaft, carrying said pulley andcarrying an armature and a commutator, mounted to move longitudinallywithin said field, and adapted to be moved into its central longitudinalposition by the action of the said field when the voltage increasesabove a certain point, thereby decreasing the speed of' thearmature-shaft, and means for automatically moving the said shaft outof' its central longitudinal position when the voltage drops below acertain point thereby increasing the speed of the armature-shaft.

4. The combination with a driving-wheel, and a dynamo mounted at anangle to the driving-wheel, of' a self-exciting magnetic field in saiddynamo, a beveled friction-pulley adaptp Signed at Newark, New Jersey,this 6th day of' August, 1903.

CHARLES A. ECK. Witnesses:

JOHN lV. JonALEMoN, FREDERICK R. LA'r'rUs.

